I’m not familiar with that plugin, I just use the regular WordPress default menu system.
If you create menus with the default WordPress menu system you can create multiple menus like Primary, Secondary….or whatever you want to label them. Then under theme location you can switch where each menu shows up. For example, I can switch the menu I have “labeled” as “Primary” to show up in the actual Secondary location of the Optimal theme (at the top) and then have the menu “labeled” “Secondary” show up in the Primary Navigation area of the theme (under the logo).
If you need to use this particular plugin to create your menu, then it would be best to contact the plugin developer or their forums for the solution to this.